{
  "manageEntity": {
    "action": "Save",
    "entityId": "1964294743",
    "entityType": "Track",
    "nonce": "0xfc9659a5681a8311aa8f1d3851e0a8be27a5147a0b13c2b23d90e20b19c8433f",
    "signature": "0xaa178ba2df5489a699cda545cae19d3d9b32ab36852f71ef63b7a4387d994574483d04a0e0e4ae71c0e4cd25d735d06cdebc885c9863aa15e4158abd89e259bc1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}