{
  "manageEntity": {
    "action": "Save",
    "entityId": "1505512424",
    "entityType": "Track",
    "nonce": "0x420c48f562b9846fe143b35931033acbdd958a744b5b6909b7f18b10c7192a7c",
    "signature": "0x7358bb4b287693cc2280eb11687656735fb4949afae25cbdf65f1a912d9005061bb32496543f082ac736196c7792c60856d9ab10cf0bce05368064d003e9aad61c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}