{
  "manageEntity": {
    "action": "Save",
    "entityId": "1408643804",
    "entityType": "Track",
    "nonce": "0x430b01e78106bd0a6d82fb9f0944dcb91c74281cb3c65bf92808f567e0b51764",
    "signature": "0xc25cacfeb165dcb9c1f3549fe78331dce5aedcd33de074bd1eb2d22679c9deb047f5ae91ccb19f40e621ab43e7fd8646d839cdfd9f6cf0fbf8d5843d637003dd1c",
    "signer": "0x24844077bE6bb825c0548F36B4EFA030d05Ee1CD",
    "userId": "601282125"
  }
}