{
  "manageEntity": {
    "action": "Save",
    "entityId": "253806585",
    "entityType": "Track",
    "nonce": "0x7b22475aa01f24d32d3ef7db9896afbb85f2ea123bd0ff5183f702f50d44fb90",
    "signature": "0x5b447a0f89ffc374bb88f5ceace938601e7f6838be31de0c54766e928edff3d67568f85180e0648cf88ad94a9946d98e715dbe984ef609424b965ee3be7e7c8d1c",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}