{
  "manageEntity": {
    "action": "Save",
    "entityId": "177097596",
    "entityType": "Track",
    "nonce": "1787952935337617371",
    "signature": "0x7efc38c457d4749bf33f99624edb65cfae13934d1ceb16cdf8d087d007e9986e6278e00e9c7e5fb4cdf0e981e293fc05eab3f72a22031a8de23fe7f381b17a161b",
    "signer": "0x6620103988B969bE5810F1B5530c1A44Fe6048A1",
    "userId": "568518925"
  }
}