{
  "manageEntity": {
    "action": "Save",
    "entityId": "1807637418",
    "entityType": "Track",
    "nonce": "0x9de8b5fc5ea11081e114d9b66ec5d180c937ab9e2017566ff8a4fa74dbce8175",
    "signature": "0x8886dbdafca6c36b8ddd140d3e6e1e14ca757214c35cc00739f733e74584082c76b03b747a71df093e6ff620aeee5845ea83c3b2e7bbbdb666fd1726890757821b",
    "signer": "0xF7628Ea36C0C266E289b7538b033fB949A6C31ff",
    "userId": "386745392"
  }
}