{
  "manageEntity": {
    "action": "Save",
    "entityId": "1515914528",
    "entityType": "Track",
    "nonce": "0x510fc4cb311700f6890c70ae797e85d6dbb43a1b8e06b0da04453189748dc9a5",
    "signature": "0x5ed41f50ee80bf1f7ca797db4ac9779a4df156d4d570a57f4797b4a48e7d3c5d519a118ef3fc9e03c437226ad941f2304faa774cbfb329bd467969f1c76939691b",
    "signer": "0xAf1f176E32866fb97d822F6f5222061aF11ef652",
    "userId": "954117045"
  }
}