{
  "manageEntity": {
    "action": "Save",
    "entityId": "1509816367",
    "entityType": "Track",
    "nonce": "0x7e564cb4404280dbb35112d484423180af99024ac72933c0491551fe9295f64d",
    "signature": "0x8f7ede8274bd45033ede13c20fbdd11b3f049fc06166f57d6d214acc8e35ddef2c6698e933ca82e48ef19525d3218039956243cdff8025163bca6e1eff6fc5421c",
    "signer": "0x24844077bE6bb825c0548F36B4EFA030d05Ee1CD",
    "userId": "601282125"
  }
}