{
  "manageEntity": {
    "action": "Save",
    "entityId": "606578440",
    "entityType": "Track",
    "nonce": "0xf1ff5af867117b7f8ba4a908705528330a0fdfb5ac8ed3c75413bcaf5b56e487",
    "signature": "0x3afe794058dc0293c11d9a30f3a85192d156ac671beb8fd7fe363108088fe1770dbd454f0f97dfa752e46ba9b7582a7362e805ff82ca8a56e4f09ca5664f8e441b",
    "signer": "0xBBBE9eFc177a4E708d317195Fa81aA6E8E2F7E92",
    "userId": "557135181"
  }
}