{
  "manageEntity": {
    "action": "Save",
    "entityId": "1455421106",
    "entityType": "Track",
    "nonce": "0x892d1c0ca7358a0d412a9207028807cea382b7eaeb27bc2cead7112ec93d6296",
    "signature": "0xdd26581f4027db675f3b4dc7d1dfa16562762df7969a6460d441a95bb2c700732ee1356f0bf5f1892435d8d82da12ae5a803b58d0922df58c4a4d5a29781fa721b",
    "signer": "0x3D472a01Cb831ac594835ac6038A4346E2A22B94",
    "userId": "327343"
  }
}