{
  "manageEntity": {
    "action": "Save",
    "entityId": "1260186406",
    "entityType": "Track",
    "nonce": "0xac43465fb260973339f3b62ad2292b2a7a82bf3c12baf95411979644ef6a238c",
    "signature": "0xd270b8ee2c37a296694153f1edfa7be7d4ca1a9cd4f8dc3c2ff3d105c6f1c9ac7150b3bb769300939ccb673eac3aed6ddf4697356af834dbbc9604d579e42a821b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}