{
  "manageEntity": {
    "action": "Save",
    "entityId": "592090",
    "entityType": "Track",
    "nonce": "0xd1d1a03b58d54f37c3bb1917b502cc9a6e44ea7d233edd4b42c10928c5cfe51c",
    "signature": "0x4c6715614fd38bbdf0d5dee91076a1fe7a442b5dce979d4f738c1d4de1607a177569b235fdc65227b0d94c3ccf469d346b221ac19934215965fceb1aeb72f62a1b",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}