{
  "manageEntity": {
    "action": "Save",
    "entityId": "193660",
    "entityType": "Track",
    "nonce": "0xabb2c3ca4ac9047c26c223dbaf37f2aca3778c49bb8e7a0eef21c3070b365a69",
    "signature": "0x9366ba0a21b743f3d84e9d4e9e241e4c8b776eea31c535a7256803a04556a70a34629132482c1f506db78495d8453b19467ae249b9929b89122f6b44e4ad79b21b",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}