{
  "manageEntity": {
    "action": "Save",
    "entityId": "1216859574",
    "entityType": "Track",
    "nonce": "0x6b3677fd5b69352d27c3472b7eeff143a52974c4294651a9860c32b05fa95a96",
    "signature": "0x5b3d7620f96c0f18ceac6b3c7177d630596883540cfdcf24ec23c09007e0ce743d16c80e320a1b868ba5636ab5d58eb3ed2161cacfff49f7f34f357bd8cb0e101c",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}