{
  "manageEntity": {
    "action": "Save",
    "entityId": "544329997",
    "entityType": "Track",
    "nonce": "0x7eb0af645b1efa2d552d84b88070cb4ec9a9deee23dab7f87be09d13e62c8ef0",
    "signature": "0x4fe012f18a6a703fe71b1d5637f2342d1834c73bd06ed95fe012ff3ece7a37987f859673ceb1f4f77dfd51576294b67df0cb0c3469cab1d8e51c9484437ac63e1c",
    "signer": "0xA66d5981794A5e084FBD9adBFF28F465924fb9a9",
    "userId": "980224167"
  }
}