{
  "manageEntity": {
    "action": "Save",
    "entityId": "1766685798",
    "entityType": "Track",
    "nonce": "0x2163354610a4a06406e7f0e8cd216c2d00fb48bedd51ee7ee807dfbb70283cfb",
    "signature": "0xeb31f50de9e46229dd00f66b35e5369ec3cd48f77b451f67a83388e94d8a46b4595fdec4dbbd20e3a8f076f2aa79cd4291793e928339cae5eb4d5c2401c60f7f1b",
    "signer": "0x4fdc03E53311BF6b1B8728dd0Ae0630bF74176f1",
    "userId": "162770660"
  }
}