{
  "manageEntity": {
    "action": "Save",
    "entityId": "1086915870",
    "entityType": "Track",
    "nonce": "0x4e84e4e18f14133647e7e1c8dce2cb97528c8be2f55c31db4d8d14cdffd5925d",
    "signature": "0xa9e98fd385148aa57c4cac53729c42c6eda3951cef701fc64889478427c8fdc7448bf3bb27bf8da89221beb252f54d21e15a1e1bc87b53042b10a95c5af35fd51c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}