{
  "manageEntity": {
    "action": "Save",
    "entityId": "23968376",
    "entityType": "Track",
    "nonce": "0x820e27c06d19a5d388be0333574aec4eceea4234254eed9529e3d7cc1fabf7a2",
    "signature": "0xe6a1c71c9ebf98fa47c0304ecaba56f024447c8b42b022fa2504727f8478757706728b2d84f4ba6f657ae10317c86cf9da3fa5014e0c9fa5c89cbde24eac65e51b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}