{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "668441",
    "entityType": "User",
    "nonce": "0x6d2b14cdfdd0dbe93d927d06b84ad64b65f2a84ba50f0696a177256de99d466c",
    "signature": "0x2131f3d5dcf0d336022a2f450bba763d4ac1237b211d624ce113d64b2e51d15f7668fb6b045cd547a0a2e845d64d47b9ae021bcfb312a495d36ea02ea192818f1b",
    "signer": "0x6eF66a6206A4589bEd5849d15Bc2746C2603b01f",
    "userId": "989336341"
  }
}