{
  "manageEntity": {
    "action": "Save",
    "entityId": "993152250",
    "entityType": "Track",
    "nonce": "0xc1c87018d5b1cff01481c81270a9808f0745a223f1683423fb6e13ddbca3e9f0",
    "signature": "0x95ecde3c74b91423b0df652c670432db912a4153c95076efa9a46028b6781902283f552d2fa0f1c20b357ec544081341aacdb0f2e127bf61072b59f903f4d3721c",
    "signer": "0x40aE1C539711FBaE3930131b028D9c764fD8EaCb",
    "userId": "35251"
  }
}