{
  "manageEntity": {
    "action": "Save",
    "entityId": "70376830",
    "entityType": "Track",
    "nonce": "0x58bc977a1691fbbaa26f6b235d326481044d31614d482a4dd827bdb21ceb3ea0",
    "signature": "0x9f738848209c86d1235cd15c0bdad651766c57bdf404fb7534bad3e162e306fe40aa07bef91438ee8e38c6972101834e391706a6896ca7d98ffde34bc417640b1b",
    "signer": "0x243A439c272133AEEE0073AF4986dE391C430866",
    "userId": "77551267"
  }
}