{
  "manageEntity": {
    "action": "Save",
    "entityId": "1963782198",
    "entityType": "Track",
    "nonce": "0xea19663b601e11e0298a9b2f796d8043b52770e7a94f576686fd7896417b70de",
    "signature": "0x3fa26ac7ca0bb9601171958ac4b8aa7ff97c3cb10a25f3c18f44f1fba11e389a7b6c4d66eec1a1c5eee9a07c78f7860cf3e282136c62c98612c3a97ab6a0f2111b",
    "signer": "0x44BAdCFCf42113CbB67f519e4efa576B336f9bf7",
    "userId": "136844578"
  }
}