{
  "manageEntity": {
    "action": "Save",
    "entityId": "788351014",
    "entityType": "Track",
    "nonce": "0x6f364bc7aa90abbc5cc3ff04c0d0e519aba56e754b6abbdc23ed9a972f3809c2",
    "signature": "0x016a872c8f87c9b8beaa873db8d2bc4e120fd0a696254e450b66e804d6e35c5c717d5c590dc9cccc1de315fe1cc420ee6920cdc616006eac0670f2b991a4c8ee1c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}