{
  "manageEntity": {
    "action": "Save",
    "entityId": "1626942290",
    "entityType": "Track",
    "nonce": "0x1e396966d3a34ddc98335cf4e6f9c243575fab5a8d9f0197c14e77e5b727d55d",
    "signature": "0xa756be37b0190d26c3f86420bede2be731bb7cd89d9f878bdee26ac1783fa05671669308b517e771b46407164c23f2396863a6412dfee5b27d7920e56b7d99ab1c",
    "signer": "0x7E7b9c4DAC3F284d889a5bc274eA80b8BA5F63ee",
    "userId": "670307808"
  }
}