{
  "manageEntity": {
    "action": "Save",
    "entityId": "1639328586",
    "entityType": "Track",
    "nonce": "0x7b0166b23c2edbc82775433a8036a73d7418d8b2ba0898a79b9023b176eed721",
    "signature": "0x6a551acbe663cfccbddf2b514a4b0d14a001701d9d29376ad836568c9cd261c266a2adce6e8121032d6c1d42ff4b5361730e1bf1cc645c047ebdcea308d822381b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}