{
  "manageEntity": {
    "action": "Save",
    "entityId": "696749136",
    "entityType": "Track",
    "nonce": "0xf96262530f407616d89ac306ef0ba40e496f784c0a2f4ecdd3ae802c0cd8f59f",
    "signature": "0x5454d7889626ad1b717423adef887b8d9ee82d17b4eac95e1a739b0202bb7a6101be595d4bfa8a99dbf53e957539e0d6e429b9df919a96fbdc9f0b8fd28395401c",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}