{
  "manageEntity": {
    "action": "Save",
    "entityId": "810190969",
    "entityType": "Track",
    "nonce": "0xfeeb4751e856bf48b8fade3917dd8d28e254dea488ac587effa37664c16318d2",
    "signature": "0xe993c999035362a1c2c29120d115b7298bf175fff8ccf94115f4cc6d0fe72ce2304e4ea17af45e094e83636217b5f383c4453c5481bc13ce11cf70ebe2a478df1b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}