{
  "manageEntity": {
    "action": "Save",
    "entityId": "2041598533",
    "entityType": "Track",
    "nonce": "0x33e2fda230ed16b4bb6d5b47ed623caa1acc9c6b070bf3a66cfab3bf9caa3f2e",
    "signature": "0x1bb4288682035ed76f5a306c80f0db8cbb74df54384b488c3185bf02c5b4750e4e2c03f51c1bedeeb133cb959fbe0789f19f5d908830aa343a606876324cc2641c",
    "signer": "0xbF4F1f4df4779768AfE75515b1552a2Bc5b4Dd32",
    "userId": "100976759"
  }
}