{
  "manageEntity": {
    "action": "Save",
    "entityId": "857738269",
    "entityType": "Track",
    "nonce": "0x0a558b2e528bb2e4487da107e6527b5083c03441887bb9f607beb37789ac2f83",
    "signature": "0xd3665854347e7b925ad459a3aa279cc0a233a5c59abf363e4b35c5e69d72422462fd8e61b1bd4edba83b57837a20d19c1c269aeb2996fc31ce646a3c55b8a7e11c",
    "signer": "0x5fa60F185681545769de01098bB8F29cfbaE3cF0",
    "userId": "489026160"
  }
}