{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x971dcb6f434ae1eb18a5b6384bdb52d43f440c6368c00dd9dad426f1c3657d53",
    "signature": "0x52726b2706a2994fc3c04d05ad7b781c2e4d340e21333de0e77ba69cb61b35403e5d51eb1cd53e62d7eb8f74a8a1efd1cf2a770b999ab61c72c789e289071f231b",
    "signer": "0xabb199c8eb8F0cafC0d96cDcCd86687cdf1B6494",
    "userId": "753839306"
  }
}