{
  "manageEntity": {
    "action": "Save",
    "entityId": "1346002258",
    "entityType": "Track",
    "nonce": "0x49eb72c5652355c95775048c8f04aa61d80efa09e8ae9bb0f2b400f0fdcb1ece",
    "signature": "0x1cc237c0657728bc668404175fe62035bad318d93b0b6a682f54a3b73ae3892356ae549b453da1a721bbdb66342104ef04bbcae7bf7c5a6b5b5910697e55ac311c",
    "signer": "0xD24271e3B8CCFB603860EA392E94eD5AE2538703",
    "userId": "456716469"
  }
}