{
  "manageEntity": {
    "action": "Save",
    "entityId": "1698273355",
    "entityType": "Track",
    "nonce": "0xa5c45a863a024c26d0a8233d4f22e431d76d60b4ef04307e5c0542cb089349bc",
    "signature": "0x515a4335d1b582a063176c24d9865590d88a09d332a9ddc9ea78a6bf4fd4b4226575b8d66242e6f0afcc001c446db7c7ea1af33420dda5e6817c4e51f343ad8a1b",
    "signer": "0x2F7db4C1AE3922aD0f32CEdED1870278dd17b64b",
    "userId": "467213409"
  }
}