{
  "manageEntity": {
    "action": "Save",
    "entityId": "1683790275",
    "entityType": "Track",
    "nonce": "0xae1eefcd77487e3ee805e9c2437a6866f14f0a2d52baf3faf43657fad410d796",
    "signature": "0x135e3397a0a4413067b3c053770f9e765a56ec5bb277c9d5b2ba1a6342869cea3fb99c8452ea16a10542a8b50ff77324712e158792050b704559670ad0feb7ff1b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}