{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "190321",
    "entityType": "User",
    "nonce": "0x495d6be840b941e92b494829b2d63d03c7ab0888d3d5a1e250a0a27cf43b8512",
    "signature": "0xc480d4f0f7289c0a0dd808e5e46ad6dc4caae43f06f11595bbb4e6f2b7278c821f025dfec97ccef341d3a1186a01c8a9edd0b8f00f3fe5a25feb6b07443494c21c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}