{
  "manageEntity": {
    "action": "Save",
    "entityId": "1015297",
    "entityType": "Track",
    "nonce": "0x99235cb8b001d1aff82522558b2c0f8294f50365beb7db84dcac6e3e87ade858",
    "signature": "0x862605228644122e855237fb5309b2ba33af39919afb7c3d1ccec523148e99bc219a8d0f83604938de21407ec71065f3d87ad66bfad520bee7f6a2865c9db2241b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}