{
  "manageEntity": {
    "action": "Save",
    "entityId": "972269658",
    "entityType": "Track",
    "nonce": "0x8c4e45dce53ec7b7647646b2d087e26d2d145940ffc8bd7856de11d54f1dc7ce",
    "signature": "0x8b42d3882dd9cf2da96a14ec997f04312e639585c2691cbce41105c32da10fd75f934d55111f6e76f339dc2dc910bcf8ee04b3be9415fc4d763d251b8e0cde591b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}