{
  "manageEntity": {
    "action": "Save",
    "entityId": "1302192495",
    "entityType": "Track",
    "nonce": "0xcdba1a16693be0afa2d4c74e9fab3cd7571cad2fac17d74f1b004c5139701776",
    "signature": "0xd93a95718b25b790de5b46847d81ef697ef93da4d135ebd877402c8c85b339ec67ac1c7cb2af277231da698b183b6bf846d0c7e692aa3548d897c22b760a21e11c",
    "signer": "0x43dA66b40816c8fb9e2B0AA77E0643192169AF14",
    "userId": "636236864"
  }
}