{
  "manageEntity": {
    "action": "Save",
    "entityId": "1790666177",
    "entityType": "Track",
    "nonce": "0xb9b2640870bd533879a1e0352ce4c37c65541aa02ae86a6d26becd4fd3b012da",
    "signature": "0x8df50340592e428daa3b9aaa222b62d7b3f61145bf7cd13b4c9d7bc9e6513668682505c2ab108e4837e5e16eb126a5d7c15abe514f49bb54580ce1b3ffb28c241c",
    "signer": "0x879AB09f06df488AF471eeBA6489678312560024",
    "userId": "903958768"
  }
}