{
  "manageEntity": {
    "action": "Save",
    "entityId": "261262",
    "entityType": "Track",
    "nonce": "0xecf6eb9635c1595c47de4c890ccc05d9559f3b30b9ef5ddd15110f20a6e45762",
    "signature": "0xf47b4470866f7a5893f5386b96f8b71357b3f7b7b14de29628cda8a52733e88755e37a2b89556adf9118a33b29ffc3d43b2ed9e136ed32cac2f1049aed8641551b",
    "signer": "0x0b901AE3Eb7b439095858D82Ff194CfeD0Fd3396",
    "userId": "167557"
  }
}