{
  "manageEntity": {
    "action": "Save",
    "entityId": "1887375841",
    "entityType": "Track",
    "nonce": "0x7df11ce235f03ba6ed13024b4db8ff64de417c1f184cc328d57cefb908fe8008",
    "signature": "0x9f6288ed1bb8b1e57a69f2968405275079183a2348604d6d9757fb2e0ea697730d8cb4f963f387e70e16ea985a786d3301f6ed68c41922793ccdee80c01649ff1b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}