{
  "manageEntity": {
    "action": "Save",
    "entityId": "2097484972",
    "entityType": "Track",
    "nonce": "0x43d88a96e8c44bea2519098253c34bda22fc8ed5d7001e10b57b526952191a47",
    "signature": "0x4328421864d1768e19de65e62b673cf2a0ecf5832dc217ccd846f65c209eed090e952e697dd8542136fd6f98572f28798321403186698e0adec428159f2bf8491b",
    "signer": "0xe5223Dc6E411A24e22DcF917955e97a8D7479d0c",
    "userId": "981716494"
  }
}