{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x215acd6122259498f65ec2a97d96d233b8531ef7051949e12a73bd4754d32104",
    "signature": "0x14588372df7c306c3286f89941e811ea2854d1aec9d493f208d2872c7fe00aa43bae36dc58d759e04ed6a18fdfd28ae54bbf206c1f62ae74e6e21eeba6ed70281c",
    "signer": "0x216E3DcB84F1654f711041294908a8f8ADb25766",
    "userId": "643512122"
  }
}