{
  "manageEntity": {
    "action": "Save",
    "entityId": "1439386022",
    "entityType": "Track",
    "nonce": "0x9486844edbefcca771fb6cb003a4a16a356d85a8b0840077044223ca219c09d9",
    "signature": "0xa134b02d3d33f88f49e23a179d56462a0dadd5eccbf7cf6d9b9b3e089cf1206749c61996b80a1f45af47f6f25b9d774d9fefcb7a38084a261f7200ed27a702f41b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}