{
  "manageEntity": {
    "action": "Save",
    "entityId": "1850528283",
    "entityType": "Track",
    "nonce": "0xa05b28df120271463ec181b1265241518385067c0102c16c5978320bf66f506a",
    "signature": "0x42f4b9bb4182708bf730cd7506bb6a6d473d7f92a926f383c7d39a4519a8399f55f3556528297add414b1de860c5f592eabed227d23684820b2d1b8d7d3d5be31c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}