{
  "manageEntity": {
    "action": "Save",
    "entityId": "1672961566",
    "entityType": "Track",
    "nonce": "0x32e9ef6ba7ed657f883521fb82c028c8791d2d09bc0183fc3c226fdb42856256",
    "signature": "0x40cede1c0b6411c82e96b13d1d8a771e89d883cc78a72ae9090d472354eacf886af7eeb232748016b7179262e455d90374a8047466c06e8115b81974de0b57911c",
    "signer": "0x7451Cf52e883bc4483b88591c194dc3942E7F191",
    "userId": "584186978"
  }
}