{
  "manageEntity": {
    "action": "Save",
    "entityId": "541266",
    "entityType": "Track",
    "nonce": "0xb87b363df3deaa12162667231be5db2e88ec23d1fa5e4dfec5965185f4d60c29",
    "signature": "0xd4d9638e19ee69322e5303be9e4b36faa06747dd104429de8c6eda12f7c770e2279b10ad5f8d1ee97e966c053e677b533cf482f71912d5b69101cc6657e968e01c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}