{
  "manageEntity": {
    "action": "Save",
    "entityId": "659717019",
    "entityType": "Track",
    "nonce": "0xa44f8335e95b8c596676f83680aeb6cbfe88657f529f34716c255151a182bbb0",
    "signature": "0x0ad987c1ab0698580d3ae8c2bacaa2ff229a2c5c2537eab5538f8ebd6c0919ee35f97c7329da58ac3316c733fe9cce9507d9de4d0062cc5c6d6039bacf7f5ff21c",
    "signer": "0x7eBAab495a64FAea1f04dc59ff804bf939da7B12",
    "userId": "709077025"
  }
}