{
  "manageEntity": {
    "action": "Save",
    "entityId": "459986732",
    "entityType": "Track",
    "nonce": "0x38821e1ca8aee016c4d561cb3e1a1e583f14e64306b43dbf73fb4058bba3b26e",
    "signature": "0x6d3c986a04dbcb7ce3638830e8ca869f5366a7c6ae401aa5ecabbee359955f8738246a1f6df3c4a464290823b28cb612713317ff1a238d84dbd69edeac70b4f01b",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}