{
  "manageEntity": {
    "action": "Save",
    "entityId": "525514299",
    "entityType": "Track",
    "nonce": "0xdacc76f1b0505adbab9c48a1f4fb36cd0fd3c661c2c7aea5b4bb0fcf882077e6",
    "signature": "0xce12a51a4dde650f4627635f98f0774543c7d64efb89456eaa514a7727368baa1f589a4f8ee6f9812d62bb81d3c5122926742d88e0296c648f43eb1ad33ec7d41c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}