{
  "manageEntity": {
    "action": "Save",
    "entityId": "1975633796",
    "entityType": "Track",
    "nonce": "0x2e9feff467a62086fb8eb293ee6fb1c551a50dd083886116aaf8b08509696bc7",
    "signature": "0xbae930c0008144b889ebfe3ebb66831d4584e114bf8981d8b84ba50fa0d909e34892a4abaffa998d195c7700285c00b5f76760f03de4946ec4d43e616da49f991b",
    "signer": "0x775bA7FB8a4FF9354c099465ca493BA949FdAca6",
    "userId": "597677270"
  }
}