{
  "manageEntity": {
    "action": "Save",
    "entityId": "291744730",
    "entityType": "Track",
    "nonce": "0xf36623722e25a051e695c35969f6a144a2cb719d1f3a39d63cf1692354dd9788",
    "signature": "0x8929089c1b2c68b00420e8c786a76119fd4050fc84944f475bce7dccdcc3afeb2ecf58d58ae349868bcc57ab5149e0abed99a93d534fb988878c1ea0f27bc7931c",
    "signer": "0xA3B40AD9bEaDeb7a11B85d9088BaC12a3F2Eca1f",
    "userId": "199809170"
  }
}