{
  "manageEntity": {
    "action": "Save",
    "entityId": "433759554",
    "entityType": "Playlist",
    "metadata": "{\"is_save_of_repost\":false}",
    "nonce": "0x4657242627221359b2e2f3164c97a794437b6737030e2f503364443970e738eb",
    "signature": "0xaa57b304fe40918555829590957f675818a21b6613ab51d40f610318590d38e80b31a0b2982ad5d531524c1dfa343e23c102effbeabfdf9db5e42690cf1e58f11c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}