{
  "manageEntity": {
    "action": "Save",
    "entityId": "185717974",
    "entityType": "Track",
    "nonce": "0xfaa607cbdcc6ae3580f91d395bd8e69b6d134add993f1244f183c45a3338297a",
    "signature": "0x3eff84940159afa2b5bb4152b250f3cc4613ba7791ad6d8ac1900b4c2614482539e60cf82e1eade5a16f21f11c815970d1cb835fa91971ce6f9f9501b7bba9211b",
    "signer": "0x1d868e2cc29848871636BdCF83a08A975835b6DD",
    "userId": "120328011"
  }
}