{
  "manageEntity": {
    "action": "Save",
    "entityId": "896710999",
    "entityType": "Track",
    "nonce": "0x838a794548f0333cd4d73638dbb63d46ac0d56975440e7daf6a1a86ec32ed3c3",
    "signature": "0x4fbb9f5cf5c40ef977bb45f6b20abfed9dab5831273fa30657e3399bf446bbfb38babae82da38a3505d192c67ed0cdd573153b9d0349f2a32aa4a69d7685da081c",
    "signer": "0x569a23a5D506E4404139fB7510738Ee5b80F5624",
    "userId": "280440301"
  }
}