{
  "manageEntity": {
    "action": "Save",
    "entityId": "1907863297",
    "entityType": "Track",
    "nonce": "0x30027112b674162c8794b702beac203e09e941af35fc37baad35f8ac2935d379",
    "signature": "0x215ca94d252428cb179266fa5a47c1deb0628ea65c9014f44ceeb8a2d2948ca72266a23e21204d6e6d743b66cd2de1d200683f83f193c12e90e3c806a9877d801b",
    "signer": "0x65b2681094e762CAD2349e6C1e2FbC8d54b9c046",
    "userId": "11153747"
  }
}