{
  "manageEntity": {
    "action": "Save",
    "entityId": "1073973306",
    "entityType": "Track",
    "nonce": "0xf904ee16aafb2d10740339417d92d5c6d2c7e77d265ed07d9a1686b1b1675d7d",
    "signature": "0xd05d3b8073c5f31f3951bb23de2c792eb306a9b8673558bf1c9668671bba0afa1f8185b5f67a5d0b41ecec7a146b2fe9fc3a9a1d1ed0cca602c86d261700ff591b",
    "signer": "0x27204C77Baa4a510c92A96A4ba3661CC53EE568E",
    "userId": "35918963"
  }
}