{
  "manageEntity": {
    "action": "Save",
    "entityId": "1646269533",
    "entityType": "Track",
    "nonce": "0xf51a4af8cf0e0108a66610c4b38b7a029e14a157d6c8481b82a4a7f520051b34",
    "signature": "0x6593092252e4df3fdee849eec651eab0242411d2f6ef876abfb8b47687bfb32a69deae425d7d518aab87791eedf10a0c65f727e74781a1db15df4778b767ecab1c",
    "signer": "0xA5fFfA5b8673Fb93490E3F9B0BeE58e1f0Ce1231",
    "userId": "508186998"
  }
}