{
  "manageEntity": {
    "action": "Save",
    "entityId": "2145097194",
    "entityType": "Track",
    "nonce": "0x669799c79a23521a7f2ba43887f2fa6cadc09f6ebaf1f17bbf26805ed3d24eac",
    "signature": "0x3e2e1d07b4fd96c47a01e01ee4d4d3b5eadd0d892f1927e22afdd25d53586c767757100da174fd39977744189649de103b61a863c601b9d8bcbfc8a97e0af8a01b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}