{
  "manageEntity": {
    "action": "Save",
    "entityId": "1766612739",
    "entityType": "Track",
    "nonce": "0xc97789963b5299865b74d656ed224d188e213a192884d4d696cc741d5ebc6f16",
    "signature": "0xb9c67dbe569d81b0d90df11b00b1ea7c5387b4256b4f3bdd9e9f86b545a5dc8a70069a184801387d743a6b94c2d892e800425df26080e332b86301a57f5629f81c",
    "signer": "0xC6f6979d7215C4611Cd7aDb30a42B2812294262c",
    "userId": "55290787"
  }
}