{
  "manageEntity": {
    "action": "Save",
    "entityId": "1896682767",
    "entityType": "Track",
    "nonce": "0x5c561440d24511fa5867689c391761e6f81338b5fdcfbe6007fd71fce85aa2cb",
    "signature": "0xa4c97c11aa7ac7e54709ff446b87d0ea61e2f63396b32fa1ddab29746986898666bab1b895608dcafa084b55d270e0b1202f907cfad144b8cab1773eb9e0d21a1b",
    "signer": "0x647204eDe2dcB8e40793BB48e4bb4Be7ab706de5",
    "userId": "580720856"
  }
}