{
  "manageEntity": {
    "action": "Save",
    "entityId": "69505",
    "entityType": "Track",
    "nonce": "0xa1bf0a8f00192cd69809319904a2ac964d3d06df579b0d51e0f91e228e1a1e13",
    "signature": "0x408ee1e3f80d58df5e5085bc9e7b1c7a7a337b1f7bfd427011e0a1be362136577a089630ade8cc1f846f7266b930f9cec9a3bfdfdac2c88736df8e217f9f3ead1c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}