{
  "manageEntity": {
    "action": "Save",
    "entityId": "1548030873",
    "entityType": "Track",
    "nonce": "0xad6b251e735daf8149f05df7696719859881b862fca956231b85615106a9caa4",
    "signature": "0x06724693e84545ad7eedd7d10ffd017a4800b35392900b21604544f3417c891100ccf3bce6885612edace764f68321ed96706b819cb5b4f12a7ad2c5dc3db0f81c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}