{
  "manageEntity": {
    "action": "Save",
    "entityId": "315827028",
    "entityType": "Track",
    "nonce": "0xdb0303fb5f89f0203daaf4e9b4c61c0bf94e99fe428045796379301d4d34fad6",
    "signature": "0xbce46bc8a9cad87cdb17c16e8e6264966db17a51024bcfa7b9a768e76723d8b816d9981b8fd929eabb7e5d0160390a06aa2f205ddef6c5992da401c6c3bfba4b1c",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}