{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "665370465",
    "entityType": "User",
    "nonce": "0x8ac4232fbc346d1ce418eed98e7cb2f6d3691b83812c276be2c9e459a88a8d6a",
    "signature": "0x9b3488eb2754a1687d677c8095b64523058fcbbbb4ffa6dba2bd456ec387344a4f6f36321ccd08a728ec353031afd4db58dafccfe0ec3558406aba82da87578c1c",
    "signer": "0x57D64A47c0B6C0789D9565B3D90270Aea276eB11",
    "userId": "199258"
  }
}