{
  "manageEntity": {
    "action": "Save",
    "entityId": "156674",
    "entityType": "Track",
    "nonce": "0x2eeefe5753a829ad92dd3824f696c35708af3baf5b4dbdfc46b9127e7fff9205",
    "signature": "0x97b3246b66278a453bbb336f76d21377b7f1bb4aa57c8e932ea6c83f3a956bb8433f165c503091748cfb3d35d6e1286c2d4e96ea82347611da017dcf25736bd11c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}