{
  "manageEntity": {
    "action": "Save",
    "entityId": "1519267222",
    "entityType": "Track",
    "nonce": "0x79adb01b6cb0c77db910538689d3c3558e73e2ed4f84e23dba57c0aa10a061fe",
    "signature": "0xa64d3203ca1b979abd41aa1724e64c6ea039c2bd5827027c4d0f775f300fcf442e6c2e0f187224e37e1a0761c53d0bda925c52fbe77476b5d7cc26708927385c1c",
    "signer": "0x102a924C1c076Dcb5816d20E32Dcb6F00e75F2C9",
    "userId": "485987672"
  }
}