{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "639",
    "entityType": "User",
    "nonce": "0x9fe26238150c26fc911a6877ef3c45f366fb3f9d9a2c89684961d49b7705e6fc",
    "signature": "0xe6904ce0f6179894e70043ff9bb6baff5b1475e91a5ae5ee83a140d0cc2d16bf63304824f7afedb706cfac63a3a9cdfcab9d125e1034983f9e12a4039d9e30311c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}