{
  "manageEntity": {
    "action": "Save",
    "entityId": "1904384649",
    "entityType": "Track",
    "nonce": "0x07d3bca9bc0f19faf61208a0eaf4608cf9bdea53afc4b10f9e84fb2cde1a8f81",
    "signature": "0xdaedb356dff1d3c0dd0ea33ad94c3b2890c9e1a7dc904e7882a53df5e9b3a9a866cf1a2fe822d23e8bf8e561456c7cb496bca79fb2d2980c6d78ceacdb0629b61c",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}