{
  "manageEntity": {
    "action": "Save",
    "entityId": "428415",
    "entityType": "Track",
    "nonce": "0x12527a3a3fa7bab78ae178772115f6216e5f76280d2d14e41f6751b09617de65",
    "signature": "0xe49063a8c58a818cd302d11b0d4d2140e3c908e46ac60623bf339cd9faeb5edf369c3fe9149d70c7fea8b90503193932ef1205544e6b7d5762287c4403baebdc1c",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}