{
  "manageEntity": {
    "action": "Save",
    "entityId": "942307967",
    "entityType": "Track",
    "nonce": "0xbd0d5ca9ab0e017f2e16cf747ca5ebb7b457bd504b318a84422131cd2bdb81c4",
    "signature": "0x68393d33d2fabfb5ee01d366d75120bb192f51a2c98730b28f0cec00f454526873325b87dd635bdd60ddfee8bf2c2352987d0a4ac85d58870acdb1c36439c30b1c",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}