{
  "manageEntity": {
    "action": "Save",
    "entityId": "1622228499",
    "entityType": "Track",
    "nonce": "0x37b3d094924398d5186cee49b5488651ce1556482c075d7e892c14e754a87e6d",
    "signature": "0xc8b5e19e35b83f53b624c2e250dcf1d6ceabf378a616bcdb8765227bb56de51d528e40b155cec9e695d6dca0fcf0a22e37b4f0025e986321feb1a142562a635b1c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}