{
  "manageEntity": {
    "action": "Save",
    "entityId": "614482",
    "entityType": "Track",
    "nonce": "0x850fa0ca5af803a64efd08ec968bdfeee52bc96c6154abd5968816ee194f3ef7",
    "signature": "0x9e4c343a7f55dd62a55da67c8f16ec34a60cf12583ce796a42d5906a5627ac2944798fed3379a56aed8127da2e24081c6d3bb33f3935afca305593df445e2ae71c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}