{
  "manageEntity": {
    "action": "Save",
    "entityId": "2001436017",
    "entityType": "Track",
    "nonce": "0x486669a1cbe7b90f5403d4cde322c60165cf12803a7503b3515b4f110a5c7aac",
    "signature": "0x3d24cdfbf5999a2ba9012338cbba9c1ba2c166e5c3c8a11a9a6b95b1f70b0a58760ae2839a07449271e2302336a61c69c9dcdd9f6948c04b0aeab3b2fe1bacfb1c",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}