{
  "manageEntity": {
    "action": "Save",
    "entityId": "35700",
    "entityType": "Track",
    "nonce": "0xaf63aee6508324b0598e1f8c6af7e3ef53d7845f15611497f969b9cb1f8cd943",
    "signature": "0x39302e6e2d0df21b9e934ab62926080779ddc728df419ecff951a7ebc89be2fb29b3e171f6c8d9f12ae9c4ee05f788531ae62d8f7f5a7c3608aa38b7310d6ad31c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}