{
  "manageEntity": {
    "action": "Save",
    "entityId": "333689151",
    "entityType": "Track",
    "nonce": "0x7804c6274c69b8abcd3ca5b9058efe3b533151c420525e8376d20f2947cf0b05",
    "signature": "0x67e8c6b47f2ccf4b5c8f6c44fc00bbc9baee238ad406ac79229e8007a7cf465c2c5864797e128649cffcc48d22f2e92eb6d050aff58ee364554c07da2c293a051c",
    "signer": "0x5b1BC6b15bFD49D3991AD6E84621e7f0FBF2a77e",
    "userId": "548409021"
  }
}