{
  "manageEntity": {
    "action": "Save",
    "entityId": "1194697542",
    "entityType": "Track",
    "nonce": "0x04ef957996f5610d32865142b6d7dba629e2f6313e43f5ba517bf191d17180f1",
    "signature": "0xed5151c0215802db7849fd859e3d31b8b06d029367ea0f0e1c56d88f9d40b6105be52edecbfbcae772c5fffbfa546c3bf4fcc874f17655648b0706edffb5d85f1c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}