{
  "manageEntity": {
    "action": "Save",
    "entityId": "732525712",
    "entityType": "Track",
    "nonce": "0xb0d3db0e996530e01696bcceaf5e5bb9a39ad4817df3df8a969043069630674b",
    "signature": "0x2a6dd5a642c0acdb753d271012ee2fc3300c566d9cca999471b2716aeaa400856df71077a0d308a79589284305283466b108f45e37da5ff498f1088aab3bad541c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}