{
  "manageEntity": {
    "action": "Save",
    "entityId": "1883898131",
    "entityType": "Track",
    "nonce": "0x2d26de9626803968d02364c766b6b7316ad452dd2725799f7938ec080146f249",
    "signature": "0x3174e129a755d6139becb388fce5d2f63aed8bea5a8ef1138e85ce6da704c3a521436986dda990730d78287b09dcf906fed99f95787183a381ae94d590f98b151b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}