{
  "manageEntity": {
    "action": "Save",
    "entityId": "1041381",
    "entityType": "Track",
    "nonce": "0x7bcd85b5b9db0a87b6b59029a50e2fba808556efa5cbff0d0cb4057ebb2cc370",
    "signature": "0xad04af8e0d896a0710543cf29d1de80c05cfc4b5b3a9805949c6c7c5822a42f51a117a3977785904bd5d2332913f07774e8abaa771971676fc6b6162655cd1b61c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}