{
  "manageEntity": {
    "action": "Save",
    "entityId": "2099574158",
    "entityType": "Track",
    "nonce": "0x1e4a6b1ec7c4053165111fe1579d9505d11aa5b822d1206539279e25eb055650",
    "signature": "0x84a325ba7acdbd3c253f0fa7dbdd7a0174a12231cb47d2fea727f7e6d2b3c7104e7507eafb611d7d2d3a9de8b7a598a691c3dd7dbdaf3da407f30ba72946cacb1c",
    "signer": "0xdA0eFB0e7b973C487c12501759aDb23012CB5248",
    "userId": "178070"
  }
}