{
  "manageEntity": {
    "action": "Save",
    "entityId": "208506",
    "entityType": "Track",
    "nonce": "0x6ada02e5d3a9f64a8299192b8ffc3dec0aac1269d04b4ca314a8a21c6573d8b5",
    "signature": "0xd15e70b00fd6218a5d3666577d707445b9a2de7f5e8a47da40840101548c75a044dbdd3213965ec5f0cb6683ab9e4161a49a267ae04b837b033bb744f9a377961b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}