{
  "manageEntity": {
    "action": "Save",
    "entityId": "1580526313",
    "entityType": "Track",
    "nonce": "0x3154cacb88611d70dd2c22a1923ddbcdb5f0265aefd54e82d798641d8b7b5f7f",
    "signature": "0x29e96460ab2984c7afbcb3b388102a8398d92446b8869731f5d249ba10a1b74b27148853cb0ad858232c21417ba043df8e0b761dff61fed65db88f3dc3b1764a1b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}