{
  "manageEntity": {
    "action": "Save",
    "entityId": "929049790",
    "entityType": "Track",
    "nonce": "0x3e8ba6d17b4db24056a44d9ac76880e0192a712e0c48daa5f50959e744ca4e2b",
    "signature": "0x60ca8bd041636c1d1d2f51abbd7a42452208d1077fffe8c73832864af6736db42a976b63f2765ad286c81251a112968b6a81587223a876926c5a53fb18996a0b1b",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}