{
  "manageEntity": {
    "action": "Save",
    "entityId": "1971556662",
    "entityType": "Track",
    "nonce": "0x51a359b0b5708cbf62e1d98e6a2907350867a8ba3d55bd06bdea429cf78ea250",
    "signature": "0x3138100ec8297b90991b8972a28b90425ae525cf99e537c451b1d4308c2aff940743a043d48a3fe7a0156d27063760200f9b6c86cc87de21356e2d6c4193c65f1c",
    "signer": "0x102a924C1c076Dcb5816d20E32Dcb6F00e75F2C9",
    "userId": "485987672"
  }
}