{
  "manageEntity": {
    "action": "Save",
    "entityId": "916171256",
    "entityType": "Track",
    "nonce": "0x7f2c4df1cc5b04cec29a409950029ae75bf924fed9ddf28bd07cc9ace25c1985",
    "signature": "0x1a43e0e301f7eb3643fecf915fde1b6aa848982508fbf506760377fe28f4912277a4ad845463d3e8878b509e7c333b623c0d6a430211dd2a181bee94fb498c601c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}