{
  "manageEntity": {
    "action": "Save",
    "entityId": "729279",
    "entityType": "Track",
    "nonce": "0xa676e29c9acc404d6ffeb5499e751f4709eddec484ea321c8d554356f50a0580",
    "signature": "0x1a6d105fe0e59bec93a5cde9786199b44557d48e24242f128873f01335c64fb81c24d967b9ee8ba8e15a2a5977e9b0cd9cf278cd20148c485ce552eb9a7f3f961b",
    "signer": "0xa8E11aa224d2579f5cbdb912866bCE84Eb10f9dD",
    "userId": "951616224"
  }
}