{
  "manageEntity": {
    "action": "Save",
    "entityId": "280025475",
    "entityType": "Track",
    "nonce": "0xc09fd1ad80b834d71dda3d8c41f02185c243440daef92c83f69d24318edfd41d",
    "signature": "0xf49d02e145aa5384d8704c69f93b4046587e81f6808b4e5f09aef9085dd746e80577a4411be2abf723e66c2de917a7011bd23f9e0ddb7c5f1dbcf7752cf2daa41c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}