{
  "manageEntity": {
    "action": "Save",
    "entityId": "905987852",
    "entityType": "Track",
    "nonce": "0x785d91d3245bcd73a9b80c17d680fe6896e096c98bc1d201d0ba8dcca7a44f21",
    "signature": "0x4478cf934dadaafa5c5ae0908479196ceaba2d868455ca3dcd88f831b4d4ee1e3f56c255ff7cde9fea85e2d6a9b4a5cc06658ccaf017925dee8901eec1ab53f31c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}