{
  "manageEntity": {
    "action": "Update",
    "entityId": "539276466",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaieragd4rnoivq4sq4xn23elwltlzfxmjxkmgucxzlyw6r66rlc52mxeq\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":1867225063},{\"type\":\"playlist\",\"playlist_id\":1016439760},{\"type\":\"playlist\",\"playlist_id\":868353925}]}}}",
    "nonce": "0xd4f61f063a77742cf171f106b3418ee6795e24e0ac4c82b1f76e21ea5218916a",
    "signature": "0x63f4abb60168985e36006106ebecef134b7242962c2065961051d75dfdc9bd0d142ea2cefa2d614e3077dcf7b5ddd95dff319f655c15b8abc86b6e08214844521c",
    "signer": "0x7e920377E93611BcF59EAfe8db8F78027330a982",
    "userId": "539276466"
  }
}