{
  "manageEntity": {
    "action": "Save",
    "entityId": "2125711614",
    "entityType": "Track",
    "nonce": "0x61a6c5cb081a06ac448cb2d4ae132dba1169b0d1e5dba74bfa8c3dd757228418",
    "signature": "0x001e4ba035ca69e3343c28fb5df1ee78810a0eec2fa9f7c404d04b1da005432d10d32f2c08b49a154364f648c73672356fd63451944ee5dd2c99c08971e5c4531c",
    "signer": "0xE83eb37Adee021461D9d1A141Ab395A6CE0B6299",
    "userId": "154583694"
  }
}