{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "668039",
    "entityType": "User",
    "nonce": "0x5bce2ac4334be066deeea551f639f6ae5980fea2fb1a299c2277cec15c9695e5",
    "signature": "0x8931f1befb1321f3ed071ede289e6a8c6e87bcc7be4470033c1154df7fbc8d3d111c8eb9676d526ac003a48d552d7b3af808599acb2220b9b8de85698433858a1c",
    "signer": "0x6eF66a6206A4589bEd5849d15Bc2746C2603b01f",
    "userId": "989336341"
  }
}