{
  "manageEntity": {
    "action": "Update",
    "entityId": "515097345",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaierajrhhmx4mln3qpbzxd7zpdt5enzae465gxlt243ribur6ee5a3sxq\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":983883102}]}}}",
    "nonce": "0xbd3073a3c02e8a0b018668853e2865c40cea8cf4c238ab7475ca41a69e260330",
    "signature": "0xc65bf79f5284706c23ce2abfe1ed7af10c8e5d3a2ef1af9b99f18c8ffb27b8a6067a59de80730e0590b75afde6e44cf609c12dd82f33a4d8758df3cdef85e06d1b",
    "signer": "0x3779c0ccEAcffc194b6C8613B9e3c7cAF9E94399",
    "userId": "515097345"
  }
}