{
  "manageEntity": {
    "action": "Save",
    "entityId": "2050127611",
    "entityType": "Track",
    "nonce": "0x6d849c836a58ebfac84fa6db2c81498dd2cf6d78ab4358f96c509a0167c88b3d",
    "signature": "0x99cd26b480bcbdfee887b195544e084d4df65110147f560caf148187f787d71f0616d6c5fb6fc81563dacac25e87fff679f1707ffbc60136a72874a6e668e0601b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}