{
  "manageEntity": {
    "action": "Save",
    "entityId": "28542916",
    "entityType": "Track",
    "nonce": "0x54bbacca184162a8d76e2095333156b7dd3db73c346525e16352063dbb90a166",
    "signature": "0x8c2bc8736fb2a3526ee2d74bab14e329cab6fdb31fa485992bcfbe8cb43db48e489706fa45514376885dced29cb4786e548d413d51a96663fe08b832b0883d3d1c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}