{
  "manageEntity": {
    "action": "Save",
    "entityId": "1893935159",
    "entityType": "Track",
    "nonce": "0x9c79bf2a4310bc74c33077fb9c1e5a04e4ff99eb77ad54ad4b82af25e9e4466a",
    "signature": "0x6298297bbc3e030bbae6b6fae57252cbf09b8db0fee47e27edaed9e9a0c98d827c5a6fcdb5ea8055eb65f936fd67e2476a4b8d7d609d4db741ba38342afadfba1c",
    "signer": "0x14FF2Ce3bf23AEeC9C140996251F6f85D8e99431",
    "userId": "53273933"
  }
}