{
  "manageEntity": {
    "action": "Save",
    "entityId": "2077954981",
    "entityType": "Track",
    "nonce": "0x4613e3798d7d296c9654e3e4221f1a3e0c26826e4b7cb83adec8cf539da6df1b",
    "signature": "0x5b116e023c63daddb290f9e5a99291fdc5533c4708263913c43f13ac13e34fb92c6bd14d4cceba7edf28dea57272fc7576c193826a02763d602baccf557013ac1c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}