{
  "manageEntity": {
    "action": "Save",
    "entityId": "183975030",
    "entityType": "Track",
    "nonce": "0x22b533b531fe3e329523c18faf20789c34a181dffadf676160d3a1057f501a9e",
    "signature": "0x02951712372d7c17971130c68a97a5bd4f3b5adcf2441c889d09d633163314af3978577eb8f21f6d74246b6011d9cf4f1b1556e153e766cdf787ea552f3756f51b",
    "signer": "0xDC5D8e6d43489811098d4d3D31fB7D6585c9Bb31",
    "userId": "735980234"
  }
}