{
  "manageEntity": {
    "action": "Save",
    "entityId": "1712663491",
    "entityType": "Track",
    "nonce": "0x0da42a06fa8ea98af9f42b9ffd00f9287860ba4576b5ed54ee951a3a947af454",
    "signature": "0xc285c4805d40621a06cd7c6dd52e19035a103acc1a054637a9df697ae6736b4a16c9dbdc33777da4f980edff6387a6f72ee64b8ef9a6f21786d2596a0114da401c",
    "signer": "0xBe0B2B2beC4B0A46ff11169512DF7f66E775c0B3",
    "userId": "196632465"
  }
}