{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "990579",
    "entityType": "User",
    "nonce": "0x01b27df6bf5c66b4ad2d9af84d6b36063da5ec28ad12c7a68196938da94e3442",
    "signature": "0xcef9045972ddc04a1fee488211729c04d28bc29092f784e61aab511d80e3e272140dc9f29b1c446f9be02e05c9ba5d8583c36f94c7708d1953b468b15c5d71471c",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}