{
  "manageEntity": {
    "action": "Save",
    "entityId": "1284857416",
    "entityType": "Track",
    "nonce": "0x90e23b39b2e2641639111290b4f8565a097f181a03f55da1cce07412aced8e8a",
    "signature": "0x383e964b8cd503c1bd60efed13f4c9b689fdb2cc89be4ee665892e3dd59924be37ec25c0a3e8f9970de73ec105bcacb3657d7602da26a8c19bd282c7da37a3161c",
    "signer": "0x481d41B4b34069e19EDC206C160447ebA0841f6F",
    "userId": "854614078"
  }
}