{
  "manageEntity": {
    "action": "Save",
    "entityId": "497121",
    "entityType": "Track",
    "nonce": "0x321e519283e36d09cfbc275bddb780491bdac7eef1726d4aa2355cbd6db853a8",
    "signature": "0xb646c42f91ccd9562964f6e5a67bddbcccb69975811322d643aff634eb2157d2065048077ecb2c80986d6baf877fc7d369ac8a8f06afc7f83a5d629e187a79c01c",
    "signer": "0x05aba01c97C4F182D989670622abE9c797782dD2",
    "userId": "508263176"
  }
}