{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "751000222",
    "entityType": "User",
    "nonce": "0x07d784eaa89ee75a5d9791864a035b564dc7a01af7b7963286aa9e0b83689d94",
    "signature": "0x959d57abfca14e338a79165ff7683950a8e85a06352da514cf40978b33b662d327aaadaf21a45fa4e54e67ef94a4676d817ad6a72c117280c803b4e8930b8bcf1c",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}