{
  "manageEntity": {
    "action": "Save",
    "entityId": "338089",
    "entityType": "Track",
    "nonce": "0x2a8438be5b219ae47ccac83ba53f9eac97f5611889d2efec85e5b74f67926ddf",
    "signature": "0x1cb53c40f0bb9fff352c8379e5cffa3b20fb87f9890e67611d58ab7b650cea5500e61532cd0b01aea3e098edf0b6905435cb9d9d4967414c999b7162ae9390661b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}