{
  "manageEntity": {
    "action": "Save",
    "entityId": "775930515",
    "entityType": "Track",
    "nonce": "0xcdc15b04f2399b90209e5dc0e7fd4915ae5585842028481dad8ca6f27e9e3228",
    "signature": "0xd1d529e3d36b128beccdd2beaf46809ace836ccc45a73c4055564c73c3f2f61341b28af3c8b4ee7ac7cc2e6437d19857010c76041938c520debf3c95c73fff8c1c",
    "signer": "0xca797dA7dCB793742623d55EA81fb92A9566B550",
    "userId": "363062902"
  }
}