{
  "manageEntity": {
    "action": "Save",
    "entityId": "916567368",
    "entityType": "Track",
    "nonce": "0xc55f4469b473e1d553c6eeb2b1cd3c143f29a2fccfac3bc4241ee9af72fb5893",
    "signature": "0x079d926f7bfc4470b657dd9cb5cfc1b715a3f2154b64987b3c71aaaea68e8c6b53b32d7cbe45b373790ab3129af587a35fff9fb85b4e3d61074f760d3284d4fa1b",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}