{
  "manageEntity": {
    "action": "Save",
    "entityId": "537694928",
    "entityType": "Track",
    "nonce": "0xac38a07d22e9e4e5460da14614230fb24e1abc79332475288b3f27c1940e33d2",
    "signature": "0x5cd612103fdbd964fd5ad2874e006e141d795eabdb7643ae5d7027db579ee11b633af08093e7a7c35c207acfd3ff2d7739d7513aa2eadb32873dea9cd7ab485a1c",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}