{
  "manageEntity": {
    "action": "Save",
    "entityId": "778161382",
    "entityType": "Track",
    "nonce": "0x2154901317dec75425eb4ecf7998ce43bcfe35419a1e55558f44adeb37f23c8e",
    "signature": "0x70e0f5e04a75b02391c999bf72401454151cdc57265beba089eb4a905ec20db53887fe7d2a9912f7d281a5a13db9425be40c40274f97ccb6f9e504926354e29b1c",
    "signer": "0x06F989586c5477333A41f6057f224Df79903862a",
    "userId": "24240642"
  }
}