{
  "manageEntity": {
    "action": "Save",
    "entityId": "1753004316",
    "entityType": "Track",
    "nonce": "0xd40bba60fa1f3b0bf250093b46b0691364ec1e4b3946e966e684cdc559119988",
    "signature": "0xbea5d1a239af1338058f5a2fc136ba4508de5b79e15d27cfc456e610edf54d320a041618a84a7c95293d0bc81ac0b72059236f11924e949d311317b3212a412e1c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}