{
  "manageEntity": {
    "action": "Subscribe",
    "entityId": "4",
    "entityType": "User",
    "nonce": "0x0e2999753d2c9370165326f7586e3d7a2e78489abfa1aba66b38b9a11996d098",
    "signature": "0xa99ea7cef12dd909f4f20ba1052368d68e843c6b1e6e911a1cb19860bb47c42e1835feaebdc04126402753f90bea9fe6a8096604532febd224e2863fb42699ea1c",
    "signer": "0xa2DaB1ebF6D10325b0948C994b592F7abB2Df44C",
    "userId": "728570067"
  }
}