{
  "manageEntity": {
    "action": "Save",
    "entityId": "570586168",
    "entityType": "Track",
    "nonce": "0x1cffd8b2257501659d5b5497200a8759d2cfa353f3ecd648157866a660667f3a",
    "signature": "0x72c020f4a5247f0f3019dfd2cdcfc6b69d941f07f53426c829497a8eae711f4716d2ed6a028e1375c788c4864c931c06b341af210d65616b2e65eccf4a5549331c",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}