{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "621126713",
    "entityType": "User",
    "nonce": "0x60dfdb522241fae8ea0d8b014ec85767e4cd763e44cec0aa5e34d22b7eaf5957",
    "signature": "0x0f83170d6dc35a896fce1602e4538576dacdee19db39cc33f1651787ecc0464e44bedae283609291f7a0dc713cc1212fe78f1131b669a516836593948ae60e711c",
    "signer": "0x9149C438b2FBf68d0e846EEfE2E6B19be686Af42",
    "userId": "843"
  }
}