{
  "manageEntity": {
    "action": "Save",
    "entityId": "406146",
    "entityType": "Track",
    "nonce": "0xbf8ac4211c24e0748f197f623be83bfc428a657a612b309b32e4755eaefb5111",
    "signature": "0xcd365eb2f920985e538bf2070c36fb132429772b72dbf8bf69ba6051b81b165a0f651a9d688884b0fcdfd04cc39ae60a0c2ce4b25c3b47c4f7cd15fdc4eb9e441c",
    "signer": "0x136A4e19270387bc21d7e58a9592D46864B0Ad57",
    "userId": "956002390"
  }
}