{
  "manageEntity": {
    "action": "Save",
    "entityId": "662335622",
    "entityType": "Track",
    "nonce": "0xa9e988ce61b7ae2fa5d732eb8351097c80101d127a6b4ab36720456d9572f40e",
    "signature": "0x332ed6a0d9d3e38fc3e2e2f13a5d419e0dcd0511764ae29caef22994b065b27d332069f155a1848a5a4411099e7bb290de25f3fa54488acc08c6b87f34dffe5e1c",
    "signer": "0x73317E9D44b6E1b7d146760b12dc5546Cd140ED2",
    "userId": "683609933"
  }
}