{
  "manageEntity": {
    "action": "Save",
    "entityId": "164447805",
    "entityType": "Track",
    "nonce": "0x76e8f477cdc3b5fd8105e2fcc4819a48b929a95f3a801302c19d7498f29ba04f",
    "signature": "0x468c0a387a7ca61ab7683e517107e61b4258cb7d124fff925abaddced0e23c6a177ad796f5da766f03038a85c58ddf80630b322ee728924d638de2958699c36d1b",
    "signer": "0x018849A3d6594093B7646022836BaaDF36aA36Ad",
    "userId": "702391481"
  }
}