{
  "manageEntity": {
    "action": "Save",
    "entityId": "1455421106",
    "entityType": "Track",
    "nonce": "0x7a378b99eac5607bef58e0283772142d71d4894c6d43362e246d153656bc71f7",
    "signature": "0x65c20ed2ae043f899e70357efa435ab535d3f349bbd2bb7443aa0d5f6a28632a4b485e87cc6435154a94f3a83c8a4c655bc9d33059de388b4711d4542b764bf31c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}