{
  "manageEntity": {
    "action": "Save",
    "entityId": "1876402150",
    "entityType": "Track",
    "nonce": "0x95525a171b9ddc0b7f566a5172de134a19994684b0c4a6b3c282863c74016421",
    "signature": "0x5aeb2f6cdc8e190e690165cc71691d419776c699b94f7ab7997831aaed60cb361bbd4796c8468dad29707c3b8277348f7b86f038618704b09de525f62ff1b7761b",
    "signer": "0x0fe82f565AaE260D57b8e691c61Fb05fE83B6F81",
    "userId": "614212580"
  }
}