{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "51",
    "entityType": "User",
    "nonce": "0x3bb47d68e25adcf64a990a16a886ecdec08ba1eac509cb585971e1ff9f7ce47b",
    "signature": "0x4980b17aa230bde4ed78ab0fa59ab38c1af1c5095c3c9a794df1c9e8b617b2c1029628ea7c7a1f8f80773ccf7969ebd50c3abc6a2ca27c68d0740bded8b3f7541c",
    "signer": "0xd48A7d94FE1bC18C3083f5426bc7A1c2337F709A",
    "userId": "356885518"
  }
}