{
  "manageEntity": {
    "action": "Save",
    "entityId": "488535",
    "entityType": "Track",
    "nonce": "0x08a8d94d3b3671c001defe2c112089a99fdd325b774ea7479f049bfb77d7fca0",
    "signature": "0x3555c1062cc0571dac4a5ba89aa23fbe7d7c7995d9c849d76eba6c26541d636b282c475f5b0ba93a67517d4c7eb4ce79dbdcc72c5b97717ef9220c415bb9d3cf1b",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}