{
  "manageEntity": {
    "action": "Save",
    "entityId": "572277323",
    "entityType": "Track",
    "nonce": "0xb88cb67d56ffe4d8561de3bd06e90e6096693a1b5c3c8159b8b194827680b153",
    "signature": "0x1723c961918e586aa0dbf7322f005bf2b62f7ae08beca9c9284a7475437dff3d3f48078845fd312497e7b6b1a6706177db59f30f09fd7c0adebe4f97ba7174561c",
    "signer": "0x14d7618B82Da4e7176FDe32e4379943eCd69798D",
    "userId": "238125623"
  }
}