{
  "manageEntity": {
    "action": "Save",
    "entityId": "1013394348",
    "entityType": "Track",
    "nonce": "0x6f22ce8c8066fda34883287add2f45bae44f3cdbf91cf77c8102870510887ff0",
    "signature": "0xabe84151ae02c5c42333c4003d6bf5afe876fc374eb195c60f3bca1b8f843005620e5575708b94d4cd283f8744583eaf93ee41672c7be36f7af5f2ec84a021cc1c",
    "signer": "0x84B42609E987DD0953e02498E61987fB833B7C92",
    "userId": "887547386"
  }
}