{
  "manageEntity": {
    "action": "Save",
    "entityId": "480251",
    "entityType": "Track",
    "nonce": "0xea52a5baf73a03bc3f7c3c8025e0a64b503ba6df14a7ff95d673f5cac2074704",
    "signature": "0xa256428c2fd82fa40077e049dc7b403369780c530f0908427c8ae35f88b166422e1c29c51709a608a12ddbc7e7cb882b181c7689ebc40d1ec8fa422fd16ee35c1c",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}