{
  "manageEntity": {
    "action": "Save",
    "entityId": "407685",
    "entityType": "Track",
    "nonce": "0xa6d750f8961c69484b3dbf9b48057b03c885143e80fd047ef896e9a07d2909e8",
    "signature": "0xbb50f063f6857e7619170dc7c0e340136955ebc0f5108df7cab03c65962252a443bbf8c25223a419f56fd903ff51493fc8d923fbec1da5b2aaf3708ffca92ec61c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}