{
  "manageEntity": {
    "action": "Save",
    "entityId": "627799",
    "entityType": "Track",
    "nonce": "0xe606bcef81907174d717b2644c227e5256eafcfa86bcdbfa83ba0f689fb458d1",
    "signature": "0x7caa506dba80df03ffa5f4f52d6270fe0222188232286dd9042a3c7b7006dd40725bff9888374ca0adcdb2376f360b922b0dd1cfb2eb64d996899c3c36c091f41c",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}