{
  "manageEntity": {
    "action": "Save",
    "entityId": "286617753",
    "entityType": "Track",
    "nonce": "0x7e4406ff81a3904629e22cc032de455a1c4b56f26930c8dbba3d6a3c42d6ee72",
    "signature": "0xd383e7a7b7040005b73e7b02f30898d2c9cd09ad3f9b28dc737ed1fbcff3ee0c71a4b8e811fbfba8386348dfea687ffa044e230d5795b9ed84be1c6877e6edd41c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}