{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "398",
    "entityType": "User",
    "nonce": "0xb3cd56336cbe4873ba57caa490c467d6a4d29b72a2196f127f129daab97ec639",
    "signature": "0xec9dc5abc9b7ec81f2a5c15ff26778ef7d7af6cd836e5205cfed2233f1219c47024e19ee639d1b775165a75bee5d680f6490c26929779eed8974d2291172293a1c",
    "signer": "0x5391496E932a3143AeB225d332e3485D8f3f2a2D",
    "userId": "712969344"
  }
}