{
  "manageEntity": {
    "action": "Save",
    "entityId": "830900014",
    "entityType": "Track",
    "nonce": "0x7eb6b52b05f1eb3427ebb5f41eb11a89ba6fde9597d698ad70f046a9a22357a5",
    "signature": "0xf16c6e92cd7f346753347d9221ea0c6d1f472252f682fd40f3be0eea7078c10b20971e177f8bdb44b8b26b9ee592dd20abec7ca7afcd19a91b019b4539d3b4a61c",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}