{
  "manageEntity": {
    "action": "Save",
    "entityId": "1047252368",
    "entityType": "Track",
    "nonce": "0x77149f7d5f87d61305561dcb4e87307c6d88250d9d83c1da8cedd2d7e5094049",
    "signature": "0xc49dffc8a7469134cf568027f1e607e3e31569c9609be815b7ecc36b12d155bb6aab01279f36c1d9011fc8acabd3cb5daa129a6443914fdcd7ff1106b7ed5e851b",
    "signer": "0x9369ae91F6A1cC4996D9126FD991d64e7E24c805",
    "userId": "333763354"
  }
}