{
  "manageEntity": {
    "action": "Save",
    "entityId": "1229947555",
    "entityType": "Track",
    "nonce": "0x73c7b4bed408a51a1350cd9804f22893cfbd16f554274480a7041a26569be5a3",
    "signature": "0x8336e1a0b5e8b4b301cc6be97c5bf41b92a7cd8642cd2cbaf3c1e20ded0f68e76f47a602db723272ad6061288c42b31190f1f3305634ca7c31ef069d93ce71401c",
    "signer": "0xAd15470171ba4f01ad3C714600D9A7E9aE62485C",
    "userId": "714646433"
  }
}