{
  "manageEntity": {
    "action": "Save",
    "entityId": "731331244",
    "entityType": "Track",
    "nonce": "0xa826566d94948ea4de6c05e856bdacbd590343fcda2ed85536240a266ba371b2",
    "signature": "0x205201b24d373c107009217d944067d1e7f2e38f31b0718d850555e82145b9cc1f0e2919fc54ef7200c522cb93542523b160457167c2bcdbf6a706d3fb244b171c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}