{
  "manageEntity": {
    "action": "Save",
    "entityId": "1739334817",
    "entityType": "Track",
    "nonce": "0xeb123addc56816e94bcd6b6c9f3d660fdd7c9c258fb0f980f46e1b18f1db5835",
    "signature": "0x6c9b396aac8d9dc4ab267638387da0c9ea5f6c1910319d5232208f1deffdcd2c32799f68d3d9c2c6add848dd5be08d92e12518659c4ad4cd2d9c13850dc602281b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}