{
  "manageEntity": {
    "action": "Save",
    "entityId": "981800416",
    "entityType": "Track",
    "nonce": "0x4f9c1f07fab0f7b4e175bf2b3e5d64816eb1bd003eb5a40ebd3635fa7da11db1",
    "signature": "0x09d6c41fa4846aa619833de35bec53dbb550ea86da205e84c54ea676314d2c8662708ba7eb78ff15ecc64744ff8485daa6a8fb75a1ba2e704bc27d9a568a06221b",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}