{
  "manageEntity": {
    "action": "Save",
    "entityId": "544442985",
    "entityType": "Track",
    "nonce": "0x76bcf6625c7b942b387810d961e4130d665e7ae208f54685667cc39b5d837c95",
    "signature": "0x6791a1272dd1d584cb516bc08bef994fabe859bb5f68c23b3344e24e4625614451bb2ace9b1cea9a6102120dcc15df673b64b24f6255febb36de036156450c621c",
    "signer": "0x849938DF063059EbF6d907f55E72C083347C9343",
    "userId": "796529120"
  }
}