{
  "manageEntity": {
    "action": "Save",
    "entityId": "1985988093",
    "entityType": "Track",
    "nonce": "0x9b9f8d962da6ae89588a7fe5715b7eb0246083a5a5ed27f7dc344425fe3a3c6c",
    "signature": "0x3658a271df704e1d3f27832decb836cd51a7154d4c36aa75fb5bca3ff348244309ae8180335c417fcfc1c3930e5a284ae794e9ff96b03c66aca3be26120cccbc1b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}