{
  "manageEntity": {
    "action": "Save",
    "entityId": "306031966",
    "entityType": "Track",
    "nonce": "0xa9f057d1ba9d56e13a0c191073c24c878f7c385329937b67941bfff4b3accfb0",
    "signature": "0x099c6ed304ff0b1fa872ae008d0606eb2bb549f8698170f6879644edff211df57bd9505d4e313ebd5a55510d5fac62b062eb253d797fb1c128051ba03b265efe1c",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}