{
  "manageEntity": {
    "action": "Save",
    "entityId": "34619141",
    "entityType": "Track",
    "nonce": "0x784f8bb3ff276eaddf9e4570326d02bc2aef7f74bb9e7952a725c60a2a8a6a4f",
    "signature": "0x9252ec4c735586713685b14dcbbf5865ee06bcfcf0a5519132d6b0c7bfd92c83302e136051585b9c3aa902a8ba4cda507345cccd41ed9a46fa707baab93421ea1b",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}