{
  "manageEntity": {
    "action": "Save",
    "entityId": "2124163954",
    "entityType": "Track",
    "nonce": "0x9b2ee9d0ede4614c9bc23a548b1b1e12e922910e0649a0f5e76fa3b9ea0d0119",
    "signature": "0x9ad1fe26a3f1b9303580a6ba28b25bd0244bdf868002ec2c2e137ccf15150bcd7742f29bda5ab721e6efb230a644b17c4be6923d59b27f50a6462491b76ca01f1c",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}