{
  "manageEntity": {
    "action": "Save",
    "entityId": "1056567759",
    "entityType": "Track",
    "nonce": "0x257a988d824423c59d27136409e068e3e1dd7ee76649ca0d1b6db270958f4556",
    "signature": "0x0fabc3c067d9621ea836ffa46dc5d64ece6c512e7305e04267157c2c11b002231f96a9678af5974e7b723edf1ac99191a4ca2f7199b1b3adbd29aa9c6a7b9bfb1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}