{
  "manageEntity": {
    "action": "Save",
    "entityId": "1484931249",
    "entityType": "Track",
    "nonce": "0x015f83258ddd4c2e1cb5fe2d0e2bbaf1f06560bef4b548fd716a9a3ac3e45671",
    "signature": "0x741cdb13276d4a66a769165702c558a4d74fa331d9b44d7d307b7800b65a48e122e0fce1eb218ad47355d135760c34d45559416d3f3fdc2d338a990ba6e9688c1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}