{
  "manageEntity": {
    "action": "Save",
    "entityId": "1363878698",
    "entityType": "Track",
    "nonce": "0x71e1800e305e5fce92783b48f2fbffdfa2956f0aedd3f7a312d26429f4cf478c",
    "signature": "0x0fad3a76a70d792914df06e16d4cd81276ecfa7be58d1de815dca8d70e8f85455be60ea4118a4e098fa84cf347aa8182731c6b3124fea5c52e9304355663e9181c",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}