{
  "manageEntity": {
    "action": "Save",
    "entityId": "1775899420",
    "entityType": "Track",
    "nonce": "0xed5a3d43751897de6ab8a7c2d64f44340dd72ca3d6a5be1180693a200dca298b",
    "signature": "0xf5a876d70cb8c9af80187a204829c66f0241ac79fd994d8f4a1440629f870b9337c04ca6a33448d28071347c3eaa1f3e3edf784f6f8173255f3d43a0cfb6c80c1c",
    "signer": "0xF08935327AeC6306C8d0eb92999567e5496848C9",
    "userId": "989073793"
  }
}