{
  "manageEntity": {
    "action": "Save",
    "entityId": "508199107",
    "entityType": "Track",
    "nonce": "0xf1a44e607c46c767cd79b43591dbefed0123662c73b02a5ece40d28be1f5d74d",
    "signature": "0xab5e278a4e2c918863614edd2cede938fe9545a4dbff17998ccca0bbd7e307684f017b4656dae6176fa29089ca9074c00cac9b188eb9c5803beb2f56dc1b96381b",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}