{
  "manageEntity": {
    "action": "Save",
    "entityId": "1258600756",
    "entityType": "Track",
    "nonce": "0xdc443a3887c0c0930cbf3875560872f0cf2416a74ef9e086c38dc2d069d18fe1",
    "signature": "0xcd49f0b939c35ff6f89eab15cd5997a23278505d02c0ccbc2a8a2e884832ed4f2e368bdb958af2f9b124fbb1d6cfcaeeeb07eed18a324bd6730f37711f8b792b1c",
    "signer": "0x48c57b64a5a12Dc7C7742Fdb629EEce52FF5591D",
    "userId": "930634116"
  }
}