{
  "manageEntity": {
    "action": "Save",
    "entityId": "194567868",
    "entityType": "Track",
    "nonce": "0xea408029b1e065dbcdb020f5c80d8340d8046520fc5bce570b594694ee5e7a08",
    "signature": "0x8dc608ea8dc8ff35591de7cb842060861223dc5a12b662a34c5cfe338b3514f6011d24e14933b5a3ab0b7940800e157bb2e872e87d7a04dd3cfb77ff19861ff61c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}