{
  "manageEntity": {
    "action": "Save",
    "entityId": "64944002",
    "entityType": "Track",
    "nonce": "0x9754bf27726599e3f68db633f476070640eaf2642d678ff24b348e4fa0ad2874",
    "signature": "0x7036b5a62afc149d216c776ddc13e09fbc597e1561b542784c6e32bfdcd62bb900f6f6faa33d201fc56f485c174ad754c906a32dfe0f3c5ce0759bd7c6d4f89f1b",
    "signer": "0x2BD0c2111290EB20B2843e8b1c0f25aA5cd52a6f",
    "userId": "618242981"
  }
}