{
  "manageEntity": {
    "action": "Save",
    "entityId": "2008711249",
    "entityType": "Track",
    "nonce": "0x5eb84b77f870a2c36ce8e6de3526faf26251c9c77f57ffa45f7d0d6db967fbe7",
    "signature": "0x4b0dd6976f3bf3a87bbd6a8f5e6883c7b55a68ad7b2fc73ef4b1f9174ad1cef175d735060fa47eafcae522cf342fb8b254f5b77fd1793f11e03249cd8a1cb6111b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}