{
  "manageEntity": {
    "action": "Save",
    "entityId": "322957",
    "entityType": "Track",
    "nonce": "0x18a2a9b4787cd224d7d38b7839ed9e5e54bb039c47ea0bcdf5f59c296cca17b6",
    "signature": "0xdf2a069ac96dc78169ddfab635ee5465de740b080661a7208b7cedd079103dd838850644396ea997865ae68b201afc9b3319eac4d56ace9a3b15559cf4119e181b",
    "signer": "0x262a2A1c96da0dFD6f33595c8D775BefA860d02e",
    "userId": "486490947"
  }
}