{
  "manageEntity": {
    "action": "Save",
    "entityId": "680108044",
    "entityType": "Track",
    "nonce": "0x50134bc47ff7fe7ef716be653dc7bab218e0280c78c6751651d4501953fd9a58",
    "signature": "0x4263f58d26497396e609239d2d321d91692462d8339364c1aa230757f6104c1d5339f24b1ce448ba5daa4ea99705e4d1f890da65cafbcd49356c483efa1af6d91c",
    "signer": "0x639B9598C075dEDFE2d8FfB1B5B6ca259D3C425E",
    "userId": "667809204"
  }
}