{
  "manageEntity": {
    "action": "Save",
    "entityId": "1768598865",
    "entityType": "Track",
    "nonce": "0x0c0282856dc28530248725f879028d524401b6c59ca59fa36805725f189719ba",
    "signature": "0xdf1d5d55b1dfa4fc24451e707ea5e224f7c4b91635f2b2eb45a4e679ddec15d35eddae58662f54d90a4584cfccef06d9b1276d59faa094346a2d70e1ad8da6b61c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}