{
  "manageEntity": {
    "action": "Save",
    "entityId": "198039597",
    "entityType": "Track",
    "nonce": "0xaa3fd16de9d6a2a58209db28f11b390976946fe284972983d2e93f8b787d08f5",
    "signature": "0x7c3457178865db6f4e58630263cf1c2ea4358237d2972af470b2291ea4a2af697c37a64bc612bb960815c454d26192417ddb7fae773197cb9366472156136d011b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}