{
  "manageEntity": {
    "action": "Save",
    "entityId": "1078522709",
    "entityType": "Track",
    "nonce": "0xc561a392e03fbecb9963ccc1e64d13dfd1dda8bcf1fed7e8da30135241ec373c",
    "signature": "0x865d1c151804064f22988166a3fb70a9f88616265a483d17899babece70ae95f28d25ffd727371e268d26539b2ba36dfefed42e152831d507f33c31f9553fe931b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}