{
  "manageEntity": {
    "action": "Save",
    "entityId": "2037565319",
    "entityType": "Track",
    "nonce": "0xc8f69d012657ed80f79ef3ecbaad3d40f7e6b5c276d324d2fc728b009d53139a",
    "signature": "0x236f43e8ffb1a7e042f65bba31653237f10b33103d91cfb27d7069b9fe132b0c6c3131f6486ca13c05743f174428e2ef3f3269e2fd35ae856add215b31df95731c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}