{
  "manageEntity": {
    "action": "Save",
    "entityId": "103838029",
    "entityType": "Track",
    "nonce": "0xdac5c7aaf453541dab9fb6d5a83fd79310edd43727359fa4983f7556bb0f65cf",
    "signature": "0xe4f06a08c6a4cd072aa96baaeaa71b559c337483050278203b3f157245935ffe23698a7fca586773ae8c7d736d7ccdc828cf9ae6aabdd458eac57d4ee9addf291c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}