{
  "manageEntity": {
    "action": "Save",
    "entityId": "1658050910",
    "entityType": "Track",
    "nonce": "0x247b14ac69fb3d21073d3f4b2a0b49e3896edb4b9fbfaf5795a71a4f75ae5533",
    "signature": "0xe56023e9e5448cb5c38f16fea068a2a9efa412f6c070e3e536a80bf22e3379e05f257e6c45c84246e0d7d7e1cdaddd06e754d4e72bc55e92a0988ecf9950978f1b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}