{
  "manageEntity": {
    "action": "Update",
    "entityId": "588125677",
    "entityType": "User",
    "metadata": "{\"cid\":\"bagaaierazxucai2ezqy5dlgzvyfvhfuq36dlx5cqoms5aolugkdqzour3j3a\",\"data\":{\"events\":{},\"playlist_library\":{\"contents\":[{\"type\":\"playlist\",\"playlist_id\":4281},{\"type\":\"playlist\",\"playlist_id\":1353432443}]}}}",
    "nonce": "0x0d004c1568be7c02babb7c9296d68880b81fa1b32f61b0c158e9c701fb8324ad",
    "signature": "0xf6bbd491537748b66b4492b6a3f0516e3d27f35d077093a958def1094db224f94f5c8b82dd3fbb18a11a63217d9d89c9728db859bbcfacac40805039c30e7da91b",
    "signer": "0xC75a276D0a36850045510B0483E737bCDd1F5E9b",
    "userId": "588125677"
  }
}