{
  "manageEntity": {
    "action": "Save",
    "entityId": "775907867",
    "entityType": "Track",
    "nonce": "0xd7700a94a127eb81f51a99be2a3df807e23c810b86abf92425e405d1139e8000",
    "signature": "0x1cb07f9fcb80caeed1eb24ba5bf520fc9907d933ec57a7e3421d9b72506af2265a485a760ddb16f237c86063f1f2c8decdf2144bd57bcdb9ba3acd581d5296851b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}