{
  "manageEntity": {
    "action": "Save",
    "entityId": "1289143911",
    "entityType": "Track",
    "nonce": "0xc7d3bcf7cba8fa41ca51b73bd9a7250a0fc584d593c4126dbc600dbf85826942",
    "signature": "0xfbbd6f0063746bd0065f3c0db1b2e6dc5900d119863a79e941b458b18794094550bce13d07e19d6fd78e66affab35594a35a898992a7e68d01c0462783742d231c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}