{
  "manageEntity": {
    "action": "Save",
    "entityId": "422635",
    "entityType": "Track",
    "nonce": "0xe3a83297cda784a55df4b356e7bcc09000e391b126ed2b4e6661c2666010f5b8",
    "signature": "0xbdd3259ba882c2b4ae156743f0233c2b2e1cd68fdf5ee9de5f21172cdceb83462d7e2d82bcefa5c2d97193229bf40cf161acc3c0a79af1791d5af876554a8bff1c",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}