{
  "manageEntity": {
    "action": "Save",
    "entityId": "1519706970",
    "entityType": "Track",
    "nonce": "0xc3e04117ce272b6cb147cf573cd2efc4549566b134a5f7235008c66995790266",
    "signature": "0x9df42f09f19d63b182b0f5058e687a53d015128d2d0610e7f542a1aa92f0ad24794fc82f54877ad2950f7f106fd61bd430c7afcbb3dc7b3f5ad9a69b7e94f3401c",
    "signer": "0xC7B16Eee24C03712c67aa884907593f4df23db87",
    "userId": "56534466"
  }
}