{
  "manageEntity": {
    "action": "Save",
    "entityId": "306637",
    "entityType": "Track",
    "nonce": "0xb26ed98aacfc77e31a3c7b0f57762bb4d28160c9b83ed171bfc3fc9b62ef4bce",
    "signature": "0xe5853a224851cf52736f4dde17ad53ff20c93bb8068c0aab32e8b786bd2a91b7648511a9cbcfacb1319a50dcdc6e036f907b6faf27df594e36184302d34845021b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}