{
  "manageEntity": {
    "action": "Save",
    "entityId": "557303947",
    "entityType": "Track",
    "nonce": "0x859e43e47115a7376b884923cc26d0222322d5d2936212637ea0a8ec10167d09",
    "signature": "0xc7cb4591c5d6f5bf66e8600cef700a2daad918e5159f8ce6de8c42ce2464fc5b364f13e13a7934a2feb6cff3ec478310ef8d2380833bd640e4827f46452268d81c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}