{
  "manageEntity": {
    "action": "Save",
    "entityId": "410894147",
    "entityType": "Track",
    "nonce": "0x89c81da532916d1725e46ac2d1675f8887df9c11c466619e1ddbe858b45540a7",
    "signature": "0x38fa4790c3279e6f176dc078020b89a3608935a5e18ed65bebc66ea90496bf22375d360945b4db0916137566f500f9967c5ad73630aa80a5c4a045c5992396011b",
    "signer": "0xE69EE1e71C27cDfa05141f1DCE82bF0231AD05f1",
    "userId": "933842159"
  }
}