{
  "manageEntity": {
    "action": "Save",
    "entityId": "1331140416",
    "entityType": "Track",
    "nonce": "0x28d231ee3b2b9731418734bc9021d42c2f9f59fd43f7c15ef9408b8f80179cee",
    "signature": "0xa73ba83bfd3c05a963c57ab2d85eed0d736f33c08e5eb3298e9ddffab144c101281ffb2a9d8a5f391c898dcbcb969e918369ae0954af0eb41b4c4d30cc0f06301b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}