{
  "manageEntity": {
    "action": "Save",
    "entityId": "104582",
    "entityType": "Track",
    "nonce": "0x96e4e98355498b65db985c1badf2e1d5272850d7359e1d0de776cdc03346a7ec",
    "signature": "0x04ea440918aaf6587c1f9e4aa8f2705def60c2951b241300029626b3ef48e258004f2d93f91734f33f15b588dff64d066b8fba7ca09455a7d8ac6ff658887e541b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}