{
  "manageEntity": {
    "action": "Save",
    "entityId": "1328902868",
    "entityType": "Track",
    "nonce": "0x1f192a1014d96b86a29e55d011e73c53c5b90c32128e51d27c711c41122c1956",
    "signature": "0xda56db45edd5887d2d46d1e8f16b0c4c17a0e79598e20043a8b9befe5d59d5063653572d53d93a8834fb34db8288010de2b61b6bb696b2e05e4178155f9b5afe1b",
    "signer": "0xA27B00F57fC7B3E81c4d7C4919aCec97E1fCf667",
    "userId": "329513359"
  }
}