{
  "manageEntity": {
    "action": "Save",
    "entityId": "1964171503",
    "entityType": "Track",
    "nonce": "0x71d1245a73d826ba6c07a321e787a4549484c6bef034c7a400ae139e46b4f8f7",
    "signature": "0xf4c8490c027939bb7902e9e29ccd13e43483357ebccf2ebdfe8e5f80a74f0fb563de7cd4dd2396853f06a495a63c7036273c3d8b10269e35a5987f43553d08c31c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}