{
  "manageEntity": {
    "action": "Save",
    "entityId": "1689654829",
    "entityType": "Track",
    "nonce": "0xb5ad163d8031f3696ffef3d6fd5e217a7eee3f20708c32655e7d5bbb45584e62",
    "signature": "0xfed8d2e111a8c9d7779d187f69820e900f00fd951f7e5e0f4f6ecfe4aff3c1d634edeba88c8fe8ca82e8c7e20fa37108d3210e3367f2145c2ea21b193f1d22b71b",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}