{
  "manageEntity": {
    "action": "Save",
    "entityId": "1298767621",
    "entityType": "Track",
    "nonce": "0x4b0c3e4e069bd0c8cae937e39cee35576562296a4c5e0c78732d4e2ae219ffb6",
    "signature": "0x7a1bfe75298e593ac46eab23a5c8a2b92a5a31eb3903592bbe9f63011941705568d499b31678e7481176237eaed713e5aed8d2f066b3f05afa99265ae43357bf1c",
    "signer": "0x98fC2b30E6e70e62dB2b5fAE7b0292DE3D4323Bf",
    "userId": "480962013"
  }
}