{
  "manageEntity": {
    "action": "Save",
    "entityId": "1150107803",
    "entityType": "Track",
    "nonce": "0xc759228b32006ab1efa2dfbbdd82d18ffacb70b81918b5d99de135e0d7ce58e3",
    "signature": "0xb85927640f50a1140af388562f40698a962f30e09bb1230a332bb995256760ee31e5d44335a631035b116e85280d315331a5aee9b63082ad56f5dbe9e74faed41b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}