{
  "manageEntity": {
    "action": "Save",
    "entityId": "325989922",
    "entityType": "Track",
    "nonce": "0x8cdad4e8fcfee068b0f211713d7d62f81d065a2c2b37ac6639d6b42b80371529",
    "signature": "0x9d5e07620fc7598a58656b34684b961a93d57c821bdfee8ca6cae71a41e75f755cef120467735e2fb9b0f64765393d7b6feb0c8113264c48a0a4d7dee93ea7121b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}