{
  "manageEntity": {
    "action": "Save",
    "entityId": "1951876734",
    "entityType": "Track",
    "nonce": "0x722bc70262dea6d15d4ae234291b1e9263a7edb4911634f3e13c944c662df388",
    "signature": "0xe214f0461698353a97b47e822a176a298b24713b13ac6a792207fb3ed94419880cd7dca095b218911b037cb2a34eee8abf205431c27d1128418867f9ecc6ca051c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}