{
  "manageEntity": {
    "action": "Save",
    "entityId": "2125011926",
    "entityType": "Track",
    "nonce": "0xb5be6eb20c6814151caa4533407c7467f48ba35974c9a7975b60efbc87187587",
    "signature": "0xd356921079157c34e4c5b1549ee1ec72fedd06697199f356e70f5e2ee840014d6a58c503742967424ea15680087820653b5d483bf6052e17f0b89f8ca509c6c01b",
    "signer": "0x5452f86EfcB1153FF9C10bdbe4103Ce25434D124",
    "userId": "620307004"
  }
}