{
  "manageEntity": {
    "action": "Save",
    "entityId": "1990346063",
    "entityType": "Track",
    "nonce": "0xe195ffdc62ebdffc701fdb0294208d716e8bdd790a585dc6104d7ecdedd30c40",
    "signature": "0x223d5bbeae680c57c233c06e078a4d524598401f07c6299588dab8e912494e2d22905b238807587c0af4ffa9998fd3a5af944278df8c15960ec31daf5798f3e51c",
    "signer": "0xbe916820AF010608151C80f3A74F7c83218094B2",
    "userId": "881446128"
  }
}