{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "304857543",
    "entityType": "User",
    "nonce": "0x6166c74bc9328d3dd634262493b82be17b0d4c4c2e828aa4ea3a4bd5fc9c469b",
    "signature": "0xf446496933592faeb9db819abd62a2e16d4b84f059da940efa81dd155377e69c66f59949d0f439786d46105c39e05a66ce954bade87920114e2fadcd7648fa9e1b",
    "signer": "0x712Aca9aA6ac07F98dcEC338Be9C15c3Dc47d569",
    "userId": "12730129"
  }
}