{
  "manageEntity": {
    "action": "Save",
    "entityId": "310908520",
    "entityType": "Track",
    "nonce": "0x22fdbec5305d1d00b02c6847b197c738f00ff3c21a2dfbdf4ce9c41596ccecbf",
    "signature": "0x0f0a1901a465838d8cb13bbc4673257489cb988ebab33c2b6be213fef7f41f517a89f9a413335ae611f81b186f6d3a313e796443da3edeabf738cf2bb01f8c841c",
    "signer": "0x044142FBd4AF7201d53A9BD1d822768a436d6314",
    "userId": "683311144"
  }
}