{
  "manageEntity": {
    "action": "Save",
    "entityId": "1402026414",
    "entityType": "Track",
    "nonce": "0xef99d2dabc39b53ea3142e65468010c5a32da417c6387533d09b72da1f31996b",
    "signature": "0x42b6dfc5e3fd78dd2e00bba568bd3e763ab3b731c6e806083cdf96038093537a595ee4f93dc1961f21e007967d75db836b2e82b4137142182e59010fd744f61f1b",
    "signer": "0x5abad058d33E1C0C0A69d85BA3181678C1721765",
    "userId": "632918751"
  }
}