{
  "manageEntity": {
    "action": "Save",
    "entityId": "284612",
    "entityType": "Track",
    "nonce": "0xd7f6716a5ab47ef765b996377b11ba9d55c2c0946efab011835c255f111ff7bb",
    "signature": "0xa38693e90399c5fb57abad8129bf11eac0c4f3f09da1ef3d610d78290fd9f16778c70c154f8d4487dd65ae6b9ade97583a9f0d31b53e228578f7f1df41adb9a21c",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}