{
  "manageEntity": {
    "action": "Save",
    "entityId": "1047730490",
    "entityType": "Track",
    "nonce": "0xe17802fe2ce4806bcd420b16006682d0dfa4944c1b0f43fb2e6b1a1870961f56",
    "signature": "0xbec5d0fd21eb781d6bd25d4f8a354308cd7078feb01846e7727641805e60042c3b4db87c8f58a819f21dfcb5360c0440aa80f9b437bbfc64727aa7449e946f0d1c",
    "signer": "0x7848c1438a663A70aF2A2B1e61f7A9229dcc818e",
    "userId": "490080902"
  }
}