{
  "manageEntity": {
    "action": "Save",
    "entityId": "1057644667",
    "entityType": "Track",
    "nonce": "0x7134a256574074c9a185bd4fe20e6172dc78792453801521fc925510a0483995",
    "signature": "0x17351c42deb0c904d984d65141b0cfcf731011afe1fdc34f25f1d4119c7219ee7bdb5a6a6942f4fa859eb3e8492c745cd0030ca895af7b0d89fbdaf3344f63a61c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}