{
  "manageEntity": {
    "action": "Save",
    "entityId": "1984513430",
    "entityType": "Track",
    "nonce": "0xbc050fbb58f2dc66ef333a7a45b963415fcbdf10ddf78b58f01d491031f6108c",
    "signature": "0xfef8669eabb76b1e5a528817215bd270afe2f8353495d44cb49fe1f5a3a956773d2d4fff5d25966e3dcd962bdd5550122c9af73a76a8279e9704de174948bb5b1b",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}