{
  "manageEntity": {
    "action": "Save",
    "entityId": "349408",
    "entityType": "Track",
    "nonce": "0x06edbf90f39f670bdf337795f5650045020a3a7ded9808153eafa2e32539d425",
    "signature": "0x15e6a9aeb68f2263514607dbabe5704b5bfa1ba1a57f22ed545df1722ac0a0981637b38f334b0797bde55eb00cfe40c7b22fc0af2a87a291971740cd2fc074b11c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}