{
  "manageEntity": {
    "action": "Save",
    "entityId": "2106065340",
    "entityType": "Track",
    "nonce": "0x1470a7fe6f2c968d4052ac1b9f75a8d9ea3f105cdf4805208344892fa5513473",
    "signature": "0xcf5121623000d8c97823713d59d6de56072879fa187e354e2dcc6496a80b11c77da9e66c390fadc51fc3a355af77f11580e62bf0b4f3d4c1fd56cd490f31d7a01c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}