{
  "manageEntity": {
    "action": "Save",
    "entityId": "238914396",
    "entityType": "Track",
    "nonce": "0x23d2754792e9927a28f73ca95defac2f659108ae007fa59197f27252e1144a51",
    "signature": "0xa85861fa7e2febb28f7001edb68b5977ea811324d02040455213fdaef61fc3a03cfb30bcf25fb2852b595209ff63e3da4810d8c5bdefd768b8e6bf1ef84d4d9a1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}